Index: sys/dev/sdhci/sdhci.c
===================================================================
--- sys/dev/sdhci/sdhci.c
+++ sys/dev/sdhci/sdhci.c
@@ -747,9 +747,9 @@
 	 * constraint for the SDMA system address.  However, controllers
 	 * typically ignore the SDMA boundary bits in SDHCI_DMA_ADDRESS when
 	 * forming the actual address of data, requiring the SDMA buffer to
-	 * be aligned to the SDMA boundary.
+	 * be aligned to the PAGE_SIZE.
 	 */
-	err = bus_dma_tag_create(bus_get_dma_tag(slot->bus), slot->sdma_bbufsz,
+	err = bus_dma_tag_create(bus_get_dma_tag(slot->bus), PAGE_SIZE,
 	    0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 	    slot->sdma_bbufsz, 1, slot->sdma_bbufsz, BUS_DMA_ALLOCNOW,
 	    NULL, NULL, &slot->dmatag);